Gas burner



Aug. 13, 1929.

T. G. ARROWSMITH GASBURNER Filed March 16, 192:?

IN VEN '1 OR. z'qfmmmmiih llllL Patented Aug. 13, 19329.

OFFICE.

Application filed March 16, 192% Serial No. 175,681.

This invention relates to a gas burner and its object is to provide an extremely simple term of gas burner which can bereadily made with a single operation in a common type of machine tool.

It will be understood that with most forms of burners that it is common to provide a plurality oft holes, or a plurality of line openings. through which the escapes to be consumed. In the present instance a minimum of narrow slots is useth but the arrangement of the slots is such that the maximum of gas will be burned for a given amount of slot area and the flame will be of a given character which will make it completely burn the gas as close to the top of the burner as possible.

Another object of the burner to provide the arrangement of slots to burn the gas at an incline so as to prevent the flame :troin directing the heat outwardly from the stove thereby causing the products of combustion to more effectively pass toward the back of the stove especially where the common form of closed top gas stove is used, and in that way prevents the products 01 COIl'll'JllSlllOIl from esca ing into the room as well as making the stove cooler for the person standing in front oi the same, the bars being so inclined as to direct the secondary air toward the back of the stove.

Another object of the invent-ion is to so arrange the burner slot with respect to the chambers supplying the gas to them as to evenly distribute the and a mixed air preliminary to the final burning of the fuel as it escapes from the top of the burner A further object of the invention is to supply the secondary air to the sheet of gas flame on each. side of each flame whereby a most effective combustion is attained with the substantial elimination of the production of any carbon-monoxide gas.

Other objects of the invention will be ap parent as the description proceeds An embodiment of the invention is shown in the accompanying drawings in which the same reference numeral is applied to the same portion throughout the several figures of the drawings and of which there may be modifications.

Figure 1 is a perspective view of a eo1nmen form of gas stove in which this particular burner has been applied, this burner being especially adapted for use with the socalled closed top gas stove.

Figure 2 is a vertical. sectional view of a portion of the stove top and flue illustrating the relation of this gas burner with respect to the stove top,

Figure 3 is a vertical sectional view 4L through the center oi the burner,

Figure l is an end view of the burner with a portion thereof broken away for purposes of illustration, and

Figure 5 is a plan view on a slightly larger scale of the burner showing the slots through which the escapes to be burned.

The numeral 1 indicates the ordinary trame of gas stove, 2 the lower oven, and 3 the upper oven door. The stove has a closed top 4: with lids 5, and from the back of the closed top a line 6 enables the products of combustion from the burners to pass up to a place of discharge. The numeral 7 represents. the gas supply pipe, and this supply pipe has the valves 8, 9, 10 and 11 thereon to control the supplied to the burners used on the stove.

The burner proper is indicated at 12. It consists of a rectangular casing having five transvrsely extending hollow members 13 to 1'1 said members being inclined about ten or fifteen degrees to the vertical, as indicated in Figure 3. These hollow members 13 to 17 extend transversely of the burner, and connect flues 18 and 19 with each other at the sides Ofiltllf} burner. The lines 18 and 19 are slightly lower than the openings through the members 18 to 17, the object bein to permit the slots through which the gas scapes to be burned, to be opened by passing a saw through said slots in a single longitudinal movement of the burner when in the machine tool.

It will also be seen that the members 13 to 17 extend slightly above the side members in which the lines 18 and 19 are formed, this object being to enable the slots to be made without cutting 1' ito the top of the side m mbers as indicated at the lines 20-421 Figure l. The burner is supplied with gas from a pipe 22 at the front which delivers the gas about the middle of the member 17, and which has the Venturi opening 23 to aid in preventing flash backs due to excess air in the gas. A suitable nozzle 24: is used to deliver the gas from the supply pipe to the Venturi opening 23. Any common form of revoluble plate 25 is used for the purpose of regulating the quantity of air that is carried along through the bell shaped opening 26 with the gas supplied to the burner.

The result of the foregoing construction is that the air which is carried with the gas into the burner is thoroughly mixed therewith, and passes toward the members 13 to 17 by first striking the back of the member 17 then passing through the flues 18 and 19, and being equally delivered to the other members 13 to 16 from both ends thereof, and the delivery of the gas is so accurate that the flame produced on the top of the burner is capable of being turned very low and at the same time is inclined backward, the object being tocause the reflected waves of heat produced by the flame to strike the underside of the top of the stove and then travel backwardly toward the flue 6 to prevent inconvenience toa aerson standin ust in front of the stove.

From the foregoing the comparatively few slots used with this form of burner can be produced by placing the burner in an ordinary planer jig, and then producing the slots all in one movement of the burner through the planer, the five saws being used to produce the five slots, all

it will be seen that of the saws being on one arbor.

It is also to be noted that the mixed air and gas strikes a flat surface under the first slot near the center of that slot, and is from that point directed outwardly to the outer hollow side members and passes gradually along its side members to the remaining slots successively, the gas gradually reaching the center of each slot, and in that way producing a very effective and even distribution with the result that the flame from each cross member is substantially the same in duced, are so inclined to the vertical that they will direct the flame backwardly somewhat and, thereby make it pass out of the flue of the stove 6 rather than toward the front, as would be the case if the flame was directed vertically, and atthe same time it will be seen that the secondary air to complete the burning of the air and gas inside the burner reaches the thin strip of flame in each instance on both sides of the body of the flame. For example, in those burners in which a series of slots are cut around an annulus the secondary air can only reach the individual flames at the end of the slot rather than on both sides of every indi-.

vidual slot.

Having thus described my invention, what I desire to secure by Letters Patent of the United States is as follows, but modifications may be made in carrying out the invention as shown in the drawing and in the above particularly described form thereof, within the purview of the annexed claims.

1. A gas burner comprising a. pair of hollow side bars, hollow slotted cross bars each of which is inclined upwardly away from the direction of the delivery of the gas to the hollow side bars to which the slotted cross bars are connected, and means to deliver the mixed air and gas substantially at right angles to the center of the first cross bar of the series, then to the hollow side bars, and successively to the remaining cross bars of the series, the slots in said cross bars being a small fraction of the width of the passageways in the interior of said successive cross bars.

2. A gas burner comprising a. pair of hollow rectangular side members, a series of hollow slotted cross bars connecting each of the side members, each of said cross bars bcing inclined substantially from the vertical away from the position of delivery of the fuel thereto, means to deliver mixed air and gas at right angles to the center of the first cross bar, and successively to the other cross bars.

3. A gas burner comprising a pair of reetangular side members, hollow slotted inclined cross bars connected to the side bars and having their upper edges extending above the upper edges of the side bars, means to deliver mixed air and gas at substantially right angles to the first cross bar of the series, and from which said gas passes to the other cross bars.

4. A gas burner comprising a pair of hollow side bars, spaced and slotted cross bars connecting the side bars, the slots being very much narrower than the hollow portion of the cross bars and inclined upwardly away from the place at which the gas is delivered thereto, whereby a narrow flame of gas extending backwardly is caused to leave the burner, and means to deliver gas mixed with air substantially at right angles to the center of the first cross bar.

In testimony whereof I have hereunto set my hand this 8th day of March, A. D. 1926.

THOMAS G. ARROVVS MITH. 

